Hadith # 35 
On the authority of Abu Hurairah, who said : the messenger of Allah said :
 "Do not envy one another; do not inflate prices one to another; do not hate one another; do not turn away from one another; and do not undercut one another, but be you, O servants of Allah, brothers.
A muslim is the brother of a muslim: he neither oppresses him nor does he fail him, he neither lies to him nor does he hold him in contempt.
Piety is right here-and he pointed to his breast three times. It is evil enough for a man to hold his brother muslim in contempt.
The whole of a muslim for another muslim is inviolable: his blood, his property, and his honor."
- related by Muslim.

